I know that even though there was no bug here, this can be an alarming experience to see old posts surfaced like this. We're working on ways to make this interaction clearer so people aren't so surprised in the future.
You ought to be doing more than that, actually. Having been an early user of Facebook, I can assure you that people viewed wall-to-wall and other types of posts differently from how they view wall posts now. No one expected their data to be exposed this way, so for practical purposes, this is tantamount to a bug or data breach from the user perspective.
Disabling this immediately for old posts or allowing users to opt out would be the right thing to do.
So you're suggesting that they replace the perception of a bug (data showing up when it shouldn't) with an actual bug (data not showing up when it should)?
You ought to be doing more than that, actually. Having been an early user of Facebook, I can assure you that people viewed wall-to-wall and other types of posts differently from how they view wall posts now. No one expected their data to be exposed this way, so for practical purposes, this is tantamount to a bug or data breach from the user perspective.
Disabling this immediately for old posts or allowing users to opt out would be the right thing to do.